package day02;

public class LongDemo {
    public static void main(String[] args) {
        long e = 1000000000*2*10L;
        System.out.println(e);  //200亿
        long f = 1000000000*3*10L;
        System.out.println(f);  //不是300亿
        long g = 1000000000L*3*10;
        System.out.println(g);  //300亿
    }
}
